Overview

Capsa brings packet capture, protocol analysis, diagnosis, and reporting into one desktop application. Its combination of traffic inspection and automatic problem diagnosis can help administrators move from a network symptom to the conversations or packets behind it, rather than relying on capture alone. It also supports PCAP, flow analysis, traffic decryption, and command-line tools.

Capture is from local sources, not remote ones. That makes Capsa a better fit for investigating traffic on a machine or local network than for collecting packets from distant sites. The Enterprise evaluation requirements name Windows 10, Windows 11, and Windows Server 2019; the product is Windows-only.

Key features

Capture and protocol analysis: Enterprise captures packets in real time and can save traffic transmitted over wired and wireless local networks. It supports more than 1,800 protocols and sub-protocols, including VoIP, giving administrators broad protocol coverage for investigating application and service issues.
Packet decoding and conversations: Packet details appear in Hex, ASCII, and EBCDIC. Capsa also monitors conversations and reconstructs packet streams, which can help connect individual packets to the exchanges they belong to.
Diagnosis and security: The software automatically diagnoses network problems and suggests solutions. Its real-time detection covers DoS and DDoS attacks, worm activity, ARP attacks, TCP port scanning, and suspicious conversations. These capabilities suit administrators who want diagnosis and security signals alongside traffic analysis.
Alerts, scheduling, and reports: Alarms can trigger email or sound notifications, and packet capture can be scheduled once, daily, or weekly. Reports can cover selected network items, the global network, or a specific network group, giving teams options for reviewing either focused findings or broader activity.

Pricing

Capsa Free is free. It monitors up to 10 IP addresses, ends a session after four hours, and does not monitor WiFi connections. Those caps make it useful for limited or occasional monitoring, but restrictive for sustained work or WiFi analysis.

Capsa Professional costs $695.00 USD per once for a single-seat perpetual license covering one machine, with one year of maintenance. It is the paid option for a single user who can work within those seat and machine limits.

Capsa Enterprise costs $1295.00 USD per once for a perpetual license. It allows unlimited monitored IP addresses and unlimited session timeouts, and has a 30-day trial. The Enterprise evaluation download is version 15.1, dated 08/05/2022, and is fully functional for 30 days. Colasoft maintenance includes priority email support, free product updates, and access to prerelease products during the maintenance period.

The substantial one-time cost of the paid editions makes the Free edition the lower-commitment starting point, but its IP, session, and WiFi limits are meaningful. Enterprise removes the stated monitoring caps; Professional is limited to one seat and one machine.

Platforms

Capsa is desktop software for Windows and captures from local sources. It supports PCAP and command-line tools, but not remote capture. These boundaries rule it out for teams that need remote collection or a non-Windows workstation.

Who it's for

Capsa is designed for small business and enterprise users, including network administrators and engineers. Its protocol breadth, diagnosis, security detection, and reporting make it relevant when those users need to investigate local traffic and review network problems in one tool. The free edition is the more constrained choice for limited monitoring; users needing unlimited IP monitoring and session timeouts must consider Enterprise.

Pros and cons

Pros

Analysis of more than 1,800 protocols and sub-protocols, including VoIP, supports a wide range of traffic investigations.
Automatic diagnosis, real-time security detection, alerts, and scheduled capture add operational monitoring capabilities beyond packet decoding.
Reports can focus on selected items, the global network, or a specific network group.

Cons

The Free edition is capped at 10 IP addresses and four-hour sessions, and excludes WiFi connection monitoring.
Paid licenses cost $695.00 USD or $1295.00 USD per once, a significant commitment for users who only need basic capture.
Windows-only local capture and no remote capture limit where teams can use it.

Alternatives

For a free option that runs on Android, Linux, macOS, and Windows, Termshark is worth considering; it requires tshark in PATH, requires tshark v1.10.2 or newer, and does not expose some tshark features. Choose Malcolm if you want free, self-hosted software under the Apache License 2.0, or NetworkMiner if its free edition and GPLv2-licensed, managed C# source suit your needs. Arkime is a free, open-source option with no license fees and no paid-only features. For Android monitoring and capture, PCAPdroid offers a free core with paid features excluded; its paid features are a one-time purchase.

Sniffnet, Wireshark, and tcpdump are also free options. For category browsing, see Network Packet Capture Software, Network Protocol Analyzers, Network Packet Analyzer Software, and Network Monitoring.

Verdict

Capsa is a strong fit for Windows-based network administrators and engineers who want protocol analysis, diagnosis, security alerts, and reporting in one local-capture tool. Its clearest reason to choose it is that breadth; its clearest reason to look elsewhere is the paid cost, especially if the Free edition's strict caps do not meet the need or remote capture and cross-platform support are required.

	Colasoft Capsa	DU Meter
Free plan	Yes	No
Free trial	Yes	Yes
Paid from	Free
Platforms	Windows	Windows
Free plan	Yes	No
Traffic decryption	Yes
Deployment	desktop
Capture sources	local
PCAP support	Yes
CLI tools	Yes
Remote capture	No
Flow analysis	Yes
Device limit		1 devices
Traffic monitoring		Yes
Alert channels		email

Colasoft Capsa vs DU Meter

Colasoft Capsa

DU Meter